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400 Amp high output alternator 1996-2004 GM Truck 4.3L 4.8L 5.3L 5.7L 6.0L *** BSTOCK ***

400 Amp high output alternator 1996-2004 GM Truck 4.3L 4.8L 5.3L 5.7L 6.0L *** BSTOCK ***

Was: $549.00
Now: $439.20
SKU:
8206400-BSTOCK
Availability:
Lead time of 5-7 business days. Need it Faster? Upgrade to one of our VIP Build Options at checkout.
Weight:
17 LBS
Serpentine Belt:
Shorter belt required for install. Find your Belt!
Caution:
Not for use in high RPM applications.
BSTOCK:
BSTOCK
VIP Shipping Options Available

*Attention!* This is a B-Stock, Display or Show Product

Mechman B stock alternators are factory refurbished units that may have been lightly used, returned, or reconditioned. They may show minor cosmetic imperfections like scratches or finish blemishes but are fully tested to meet Mechman's strict performance and reliability standards. These units offer the same high-output performance as new alternators at a reduced price, making them a great value for budget-conscious customers. B stock alternators are typically sold with a 90 day warranty.

The discounted prices are only valid on our website and do not qualify for any special promos, dealers, distributors or codes. We’re unable to honor these discounts for phone orders or anywhere else as these are meant to be a quick and simple alternator purchase for our customers.

These alternators are built to spec and are not applicable for modifications such as paint, clocking, pulley changes, harness swapping or regulator upgrades.

Installation Notes:

This unit comes equipped with a smaller 1.75 inch diameter alternator pulley, and will require a slightly shorter drive belt for proper belt tension.  Not recommended for sustained use above 5,000 RPM engine speed.


The Elite series 400 amp alternator offers great amperage output and durability at a great price. 6 phase technology, combined with massive twin rectifier assemblies and 12 huge diodes make these alternators totally durable for daily use. These impressive alternators produce 200+ at engine idle RPM and 400+ amps at cruising speeds HOT RATED. Like most high output alternators, this unit comes with a smaller diameter pulley, and will require a 1/2 inch to one inch shorter than stock length belt for proper belt tension in most applications. Installation Notes: This unit may require an additional rectangle to oval adapter harness if the vehicle was originally equipped with the CS144 Heavy duty charging option from the factory. (this is not common) This unit is a direct plug in for any truck originally equipped with the more common oval shaped 4 pin plug as shown.

Fitment Guide:

Make Model Engine Size Year
Buick Rainier 5.3L 2004 - 2006
Cadillac Escalade 5.7 / 6.0 / 6.2 1999 - 2004
Chevrolet Astro Van 4.3L 1996 - 2005
Chevrolet Avalanche All Engines 2002 - 2004
Chevrolet Camaro 5.0 / 5.7 1998 - 2002
Chevrolet Express Van w/4 pin plug 1996 - 2016
Chevrolet Full Size Truck All Gas Engines 1996 - 2004
Chevrolet Full Size Truck 6.6L Duramax 2001 - 2007
Chevrolet S-10 / Blazer 4.3L 1994 - 2004
Chevrolet SSR 5.3 / 6.0 2003 - 2006
Chevrolet Suburban w/4 pin plug 1996 - 2004
Chevrolet Tahoe/Full Size Blazer All Gas Engines 1996 - 2004
Chevrolet Trailblazer 5.3L 2003 - 2006
GMC Envoy 5.3L 2003 - 2006
GMC Full Size Truck / Sierra 4.3L 1996 - 2004
GMC Full Size Truck / Sierra 4.8L 1999 - 2004
GMC Full Size Truck / Sierra 5.0L 1996 - 1999
GMC Full Size Truck / Sierra 5.3L 1999 - 2004
GMC Full Size Truck / Sierra 5.7L 1996 - 2000
GMC Full Size Truck / Sierra 6.0L 1999 - 2005
GMC Full Size Truck / Sierra 6.6 Diesel 2001 - 2006
GMC Full Size Truck / Sierra 7.4L 1996 - 2000
GMC Full Size Truck / Sierra 8.1L 2001 - 2005
GMC Safari 4.3L 1994 - 2004
GMC Savana Van w/ 4 pin oval plug 1996 - 2016
GMC Suburban w/ Oval plug 1996 - 2004
GMC Yukon w/ Oval plug 1996 - 2004
Hummer H2 6.0L 2003 - 2007
Oldsmobile Bravada 4.3L 1994 - 2001
Pontiac Firebird 5.0 / 5.7 1998 - 2002